It only does this on the 3D transitions too, every other transition is perfectly fine. I have tried various render settings such as presets in Vegas and also from some advised setups on Youtube however the same problem occurs everytime I render in 4K. I'm using Windows 10, have an Nvidia GeForce GTX 1650 and Intel(r) HD graphics 4000 and Vegas Pro 19.0 if this helps.

It plays perfectly fine in the preview window on the project, just when rendering they mess up to the point where it's becoming a bit pointless using the 3D transitions if I want to render the projects in 4K. it's only the 4K settings that does this. Hi guys, I've had this problem a while and can't seem to manage to fix this, I've tried so many things including different render settings however the 3D transitions when rendering in 4K always glitch, they're absolutely fine when rendered in 1080p etc.